n2n is an open source Layer 2 over Layer 3 VPN app utilising peer-to-peer architecture for network membership and routing. Unlike many other VPN programs, n2n can also connect computers which reside
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93a719a0e80ebb381ec63de61632cc4b811faf961b4f234c389972a288a1e45. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/67a1bfae-9418-4f01-95f8-096f8278e971.json and https://artists.proofprofile.net/proofs/artist/67a1bfae-9418-4f01-95f8-096f8278e971.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).